The day after we brought this little energenic ball of fire home he ran so fast out the back door that he tripped over the track on the sliding glass door and took a tumble. After a month of being in a cast it was removed and appeared to be healed. Then two weeks later he ran out the front door only to do the same thing and re-brake it. Well another 5 weeks in a cast and all seems to be well now accept his leg is a little smaller than the other one due to not growing inside the cast. Oh well hes still lots of fun.